Hi, did you ever find a solution to this problem? It's driving me crazy... is it because I'm using a Slingbox pro-hd? I think it's ridiculous that we can't stream using Chromecast b/c they want you to buy a new model... the whole reason i bought a cheap Roku TV is so I didn't have to buy a new slingbox...
So I am using a Galaxy S4 and just purchased a new model Insignia Roku TV from best buy. When I stream slingplayer from phone to the TV it works great but the aspect ratio is off and wont give me full screen. I have DirecTV at home and when I use their remote via Sling, press format, it shows that I'm on 480p and there are no options to change the aspect ratio that I've found. When I tested my phone/roku at my previous home I streamed fullscreen from phone to roku stick with no problem at all. Can someone please help me figure out settings so I can stream full screen? Would be forever grateful, thanks!!